I have been looking for a speaker setup, 2.1 as I do not have a lot of space and I will be going to college later in the year. I was wondering what are good choices for 2.1 speakers that are UNDER $50. At my local Office Max there are Logitech Z-340's and Logitech X220's. What are the difference between these two? Any other brands/recommendations are welcome too as long as they stay under $50. Thanks!